package mianxiangduixiang;

public class GouZaoShunXu {

	public static void main(String[] args) {
		String s1="hello";
		String s2="world";
		System.out.println(s1+"  "+s2);
		change(s1, s2);
		System.out.println(s1+"  "+s2);
		
	}
	public static void change(String s1,String s2){
		s1=s2;
		s2=s1+s2;
	}
}
